diff --git a/Project.toml b/Project.toml
index d89a0b5..25d0e4e 100644
--- a/Project.toml
+++ b/Project.toml
@@ -29,7 +29,7 @@ EFIT = "1"
 IMAS = "1, 2, 3, 4, 5"
 IMASggd = "3.3"
 Interpolations = "0.16"
-JSON = "0.21"
+JSON = "0.21, 1"
 LinearAlgebra = "1"
 LsqFit = "0.15.1"
 PhysicalConstants = "0.2"